Nexperia

LSF0108

8-bit bidirectional multi-voltage level translator; open-drain; push-pull

11.1. Waveforms and test circuit

aaa-030284

output Bn, An

input An, Bn

tPHL

tPLH

VM

VM

VIH

VIL

VOH

VOL

VM

VM

Measurement points are given in Table 8.

Logic levels: VOL and VOH are typical output voltage levels that occur with the output load.

Fig. 5. The data input (An, Bn) to output (Bn, An) propagation delay times

aaa-030285

tf

10 %

10 %

90 %

90 %

90 %

10 %

10 %

VIH

0 V

VIH

negative

pulse

positive

pulse

0 V

90 %

tr

tr

tf

a. VI source waveform

aaa-030286

EN

up/down translating

refB

Bn

LSF0108

refA

An

Rpu

Vpu

VrefA

CEN

CL

S1

S2

VI

VO

VEXT

switch

S1

S2

Translating up

Translating down

RL

1 MΩ

b. Test circuit

Test data is given in Table 8. The An and Bn pins may be exchanged.

All input pulses are supplied by generators having the following characteristics: PRR ≤ 10 MHz; ZO = 50 Ω.

Definitions test circuit:

CL = Load capacitance including jig and probe capacitance; CEN = Decoupling capacitance;

Rpu = Pull-up resistance; RL = Load resistance; S1/S2 = Test selection switch.

Fig. 6. Test circuit for measuring switching times

Table 8. Test data

Input

Output

Load

tr, tf

VM

VM

CL

CEN

RL

Rpu

≤ 2 ns

0.5VrefA

0.5VrefA

15 pF, 30 pF, 50 pF 100 nF

300 Ω

200 kΩ

LSF0108

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Nexperia B.V. 2019. All rights reserved

Product data sheet

Rev. 1 — 18 September 2019

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